Dermatology Nursing. 2007;19(1):83-84. Athletes may develop sports-related subungual hematomas. Repeated trauma to the nail bed occurs each time the toe contacts the inside of the sneaker.

Zhang, X. and Zeng, X. (2025) Diagnostic Challenges and Multidisciplinary Management Strategies for Manicure-Induced ...

A dermatologist has warned that a specific mark on your nail could be a sign of a serious health problem – so it's important ...

This may be a sign of a rare type of skin cancer, Subungual Melanoma. Although this is rare, it is a serious type of skin cancer, and if anyone notices it, they should immediately reach the hospital.